||Brand|Active ingredient|Therapeutic area|Pathology|
|---|---|---|---|---|
|1|Ebastel and others|Ebastine*|Respiratory|Allergy|
|2|Prevencor|Atorvastatin|Cardiovascular|Cholesterol|
|3|Esertia|Escitalopram|Central nervous system|Depression|
|4|Plusvent|Salmeterol+fluticasone|Respiratory|Asthma & COPD|
|5|Almogran and others|Almotriptan*|Central nervous system|Migraine|
|6|Parapres|Candesartan cilexetil|Cardiovascular|Hypertension|
|7|Airtal and others|Aceclofenac*|Osteomuscular|Pain|
|8|Opiren|Lansoprazole|Digestive|Ulcer|
|9|Dobupal|Venlafaxine|Central nervous system|Depression|
|10|Tesavel & Efficib|Sitagliptin & sitagliptin + metformin|Gastrointestinal|Diabetes|
|11|Solaraze|Diclofenac solium + hyaluronic|Dermatology|Actinic keratoses|
|12|Almax and others|Almagate*|Gastrointestinal|Antacid|
|13|Balneum and others|Soya oil|Dermatology|Atopic dermatitis|
|14|Pantopam|Pantoprazole|Gastrointestinal|Gastroesophageal reflux|
|15|Decoderm Tri and others|Fluprednidene|Dermatology|Mycotic dermatitis|

Question: how many brands treat the central nervous system?
Answer: 3